Air and stack valve for reversing-furnaces.



P, TSCHUDY. AIR AND STACK VALVE FOR. REVERSING FURNACES.

vAPPLICATION FILED JUNE 17, 1911.

1,069,206. Patented Aug. 5,` 1913.

REDERICK.. Ts

CHUDY, OF BIRMINGHAM, ALABAMA.

AIR AND STK VALVE FOR REVERSIN'G-FURACE' specification of Letters Patent.

Application filed June 17, 1911.

.Patented Aug. 5,1913.' Serial No. 633,849.

.l'o all -w/zom it may concern.'

Be it known that I, Fnnoniuck TSCHUDY, a citizen of the United AStates. residing at Birmingham, in the count)Y of Jefferson and State of Alabama,-

have invented certain new and useful Improvements in Air and- Stack Valves for Reversing-Furnaces, of-

which the following is a specification.

M v invention relates to 'regenerative reversing by-product coke ovens and has particular reference to a novel valve for use in connection with such furnaces.

ln the operation of coke ovens of the above description, it is `usual to admit air and from either cnd ot' the heating furnace; that is. the air and gas are admitted from one side,` mixed and burned, the products of combustion passing through the checker work out to the stack. When the furnace is reversed. the air is received into the furnace through the checker work, previously heated by outgoing products of combustion.

My invention has for its object the provision of a valve by means of which, when in one position, air may be admitted to the furnace and, when in the other position, the products of combustion may pass therethrough into the stack Hue. To this valve is added a noved regulating damper by means of which each individual furnace in a battery of many furnaces may be regulated to suit the requirements of that furnace.

With these objects in view it may be considered that 'ny invention consists broadly in a combined air and stack reversing and regulating valve, a particular description of which will appearv hereinafter and be pointed out in the claim. i

My invention will be more rcadil'vunderstood by reference to the accompanying drawings, wherein Figure 1 is an end elevation of a valve such as contemplated b v nie, and Fig. Q is a central', vertical section through the valve shown in Fig. 1.

.Referring more particularly to the drawings, it will be seen that l provide a body portion composed of upper and lower halves 1.1 and Vl2 respectively. These halves are provided with abutting flanges 13', 1l, through which suitable fastening means may be inserted. The two portions, when united form a duct l5, which may communicate with the interior of a furnace and provided.

through .whichl may pass the*incoming:'airfolv-outgoing products offcombustioinlv The upper halt' tains an air inlet opening 1G. which' may, as at. with the atmosphere. or may connect .with

a-saitable source of supply either at atmospheric or higher pressure. The lower half 12, of the body portion contains a duct 1T. con'inlunicating preferably with the stack flue, not shown.

Mounted on a shaft 18, which is seated inbearings formed at thc line of division between the upper and lower halves, l provide a valve member 19, adapted when in one position, to cover the opening 16 and in the other position to cover the opening 17. Mounted on the member 19, I provide a loop 20, to which may he connected a link 91, joined by any suitable means to one arni Q2, of a rocker, the other arm 23 having a bifurcated portion 24, a cable Q5 being seated between the two arms formed by the bifurcation. ln the present instance the connection to the cable is loose or sliding, stops 26 being provided on the cables, a small amount of lost motion being therebv the rocker arm 1s mounted is a counterweight 27. As shown in Fig. 1, when the valve 19 is in its lowerinost position, the counter-wei ht is slightly oft' center and exerts no in uence on the rocker arm. However, as shown in dotted lines, when the rocker has been moved to the right, as viewed in Fig. 1,' the counterweight will tend to hold the valve 19 securely over the opening 16. This provides against anypossible accidental opening of the valve.

Mounted in the4 opening 17, by means of suitable bearingsfin the lower half 12., l provide iaV shaft 28,l having secured thereto and turning. therewitha damper 29. As shown, a portion is remov 1l fromy the dainpcr Q9. in order that when 'it is in the position of Fig. 52, it may clear the valve seated over the openingl 17. Keyed to the shaft'is a segmental ear 30, provided for the operation of the ramper and its retention in adjusted posit-ion. A pawl or stop 31, mount ed on the integral projection 11a, co-actsv with the teeth of the gear 30 and serves to hold the damper in adjusted position.

lt will be seen that the valve seats in the parts 11, 12 are circular and ccntinuous, the

shaft for the mounting of the valve 19 being present. contemplated comnnu'iicate-` l1, ofv the main member con .'\lso keyed to the shaft on which l composeal of two halves suitably joined at oeii edges oiming a conduit, the upper half of said casing containing en opening 'to the atmosphere, the lower half containing an opening communlcatmg Wlth the furnace stack, e Hap valve pivotecl at the junc-v tion o the two halves and adapted to Close either the opening to the atmosphere or to the steek, substantially as described.

FREDQTSCHUDY.

Witnesses:

C. F. BRYANT, (l. BENFORD. 

